#!/usr/bin/env python

# Copyright (c) 2009, Purdue University
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"""Tree export tool for Roster"""


__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.17'


import sys

from optparse import OptionParser

from roster_config_manager import tree_exporter


def main(args):
  """Collects command line arguments. Exports tree.

  Inputs:
    args: list of arguments from the command line
  """
  usage = ('\n'
           '\n'
           'To export all bind trees:\n'
           '\t%s [-c <config-file>] [-f] [-q]\n' % sys.argv[0])

  parser = OptionParser(version='%%prog (Roster %s)' % __version__, usage=usage)

  parser.add_option('-c', '--config-file', action='store', dest='config_file',
                    help='Config File Location', metavar='<config-file>',
                    default='/etc/roster/roster_server.conf')
  parser.add_option('-f', '--force', action='store_true', dest='force',
                    help='Export trees even if nothing has changed in the '
                         'database.', default=False)
  parser.add_option('-q', '--quiet', action='store_true', dest='quiet',
                    help='Suppress program output.', default=False)

  (globals()["options"], args) = parser.parse_args(args)

  tree_exporter_instance = tree_exporter.BindTreeExport(options.config_file)
  try:
    tree_exporter_instance.ExportAllBindTrees(force=options.force)
  except tree_exporter.ChangesNotFoundError:
    if( not options.quiet ):
      print ('No changes made to database. In order to export use the --force '
             'flag.')
  except tree_exporter.Error, error:
    print 'ERROR: %s' % str(error)
    sys.exit(1)

if __name__ == "__main__":
  main(sys.argv[1:])